<template>
  <div class="star" :class="'star-'+size">
        <span class="star-item" v-for="(sc, index) in starClasses" :key="index" :class="sc"></span>
    </div>
</template>

<script>
export default {
    props:{
        score:Number,
        size:Number
    },
    computed:{
        starClasses(){
            const {score} = this
            const scs = []
            //向scs添加n个'on'
            const scoreInteger = Math.floor(score)
            for(let i = 0; i < scoreInteger; i++){
                scs.push('on')
            }
            //向scs添加0/1个'half'
            if(score*10 - scoreInteger*10 >= 5){
                scs.push('half')
            }
            //向scs添加n个'off'
            while(scs.length < 5){
                scs.push('off')
            }
            return scs
        }
    }
};
</script>

<style lang="stylus" scoped>
                        @import "../../common/stylus/mixins.styl"
                        .star //2x图 3x图
                            float left
                            font-size 0
                            .star-item
                              display inline-block
                              background-repeat no-repeat
                            &.star-48
                              .star-item
                                width 20px
                                height 20px
                                margin-right 22px
                                background-size 20px 20px
                                &:last-child
                                  margin-right: 0
                                &.on
                                  bg-image('./images/star48_on')
                                &.half
                                  bg-image('./images/star48_half')
                                &.off
                                  bg-image('./images/star48_off')
                            &.star-36
                              .star-item
                                width 15px
                                height 15px
                                margin-right 6px
                                background-size 15px 15px
                                &:last-child
                                  margin-right 0
                                &.on
                                  bg-image('./images/star36_on')
                                &.half
                                  bg-image('./images/star36_half')
                                &.off
                                  bg-image('./images/star36_off')
                            &.star-24
                              .star-item
                                width 10px
                                height 10px
                                margin-right 3px
                                background-size 10px 10px
                                &:last-child
                                  margin-right 0
                                &.on
                                  bg-image('./images/star24_on')
                                &.half
                                  bg-image('./images/star24_half')
                                &.off
                                  bg-image('./images/star24_off')
</style>